Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09bb4ae06e5bdb818cbc3171af789866c564ac1e60da1330c2ae3db38e8e276d' 
  AND token = 'C3hCTNWf6jnHkCiRX138tINY0/x0AlZQqbEhpICCeDI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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