Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7239d0f4114c67640077e685fb8d1e8c54d894d2027328a63abf26eec6f4c00' 
  AND token = 'GMxiWiaYcILDTWI0si/TO5YFmr4teiqhhUjZZ1Ey9Y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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