Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ea07850828f3b908981b274bdde91f97570c7fb21579309550e1f9b9d35c6b6' 
  AND token = 'PvvMTNWAu96YtkqaGi1mXRW10LOnQ2X8lc8xJc7HB6I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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