Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d8302a29dd0aff06b6631ea2676e629300a6cfb4ffd43dea2e6f8b09f96ec85' 
  AND token = '17WoCrEs6XhA7NOj+oNRGAvptzuZq21wzc/07V42BTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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