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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e7063d825c5e4407dd04014da182575c1933d99ec3de9bc5b6e6ac91f9f3d41' 
  AND token = 'SoqTXlWazUpM/qfK6olCV3udevUO4Nv5X8qV5YFmj0Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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