Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '414ada1b728904c0b3462738160ca1bb66c286a31ac545bf7699a0dfa4b1a03a' 
  AND token = 'l+bSsXDXD3mPOdJvhgDAP7hOkmU95zCrV4lRBLYDaQc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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