Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e417529c2ce6ef8dd5eb20a9d7bc70cb299f21d1c1524bd7c3f95d69319dc0ea' 
  AND token = 'L3IQEADBAMtnqyno5YAxmyMvl1ns6fWODMntKMJUD/Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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