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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d01ce6d974dec28ec9351d3f1cbba90cb83234fa5674418e1c23746ab06fd35' 
  AND token = 'AWxuYSHM0J2q2WX1XrFg9DZg2dlH9VZo7VTiwWzVW44=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}