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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e8e4e5c3ad6f7c02cb67a57728117154b877f7ac5968d1c1f8224077c744c9d9' 
  AND token = 'oPD+uhvBdggYDYT/PIbaeYNa/L8Nm6J7fz0GlfkgACc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}