Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af06e0b5429026011b11f1e034e53254c2ef664312a36606fed42b8e8d74c1ac' 
  AND token = 'Rvc9nflakUaMFBr0wPx8EBEs81ACY/ZTgf9MtaoQE6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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