Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e591e614b5f989f0cf9e643188dd7beae6103db0a43e2a9c896edef72d0a5ac0' 
  AND token = 'g4p7UBZdmWu38wBwlFGP5ZUxePI0x/+Qms8pc9C8mvE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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