Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83de815a76024fc04c4040223c068add6233c1b3e24209d682e88f3a5a745dcd' 
  AND token = 'Qi8kKJ8QHF0p+joRa2BSeo4MKuxId2a9zKgFkEfvCO4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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