Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5cc5622e56be80955127fe011636a7123e972255dd52ad4e72660890e7a61fd' 
  AND token = 'XM+q0fsuSWSLqKVCcbk9q9lGx8Np7xJc6MREtnCYNCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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