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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b7955ae0b9dd0c5766e73c00d6e47cf2e79ff674cc714c9d10ba693d91a42dd' 
  AND token = 'F/Fq6q+WX74DYo9nNYr29SEgnVDLj2jYscBedMCAZLc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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