Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '505cbe5cada3c5edbcfaf90709ffe40ed6552bc121fd152b4a609594f0bc6c6c' 
  AND token = 'Rx3swqAWRNduvAYmBPYGddrOvpMjdtZeKKLP4VACEWI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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