Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f95efe8c94f6cc1917c3e3ce6ed4c431246abccae4d0637fd19ea4ce6837eded' 
  AND token = 'HAVxAU+ZLcVxWP9eEHdJY12u0yM534lrKsU06Ia8Rn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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