Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c1ca31a1c9aa845dca5cdb25eca80577343f5b3be48e2cd21b9db33549c3b84' 
  AND token = 'HXZpOSbwD01KwJBeiYGBU3aWyaRL/CsVnyMwggP0cJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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