Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2bce7babc04826f08c7ab7712f6c19e1286c01e42957445243e1a4e0cbdc631' 
  AND token = 'ZFBab74MZkuD7x4EUdgknVwn9QQ9eYR1gwvA7SO37zg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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