Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c2c429c48163a0b8c37133901cd930f807e0b23b08d2b205625123ecc81f64f' 
  AND token = 'Z5ndXUrCIkg5hDaKQP1ZiX3rjDCpF3mbKiqN7HqmSoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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