Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98c8657eb15b9aab9e4cd1d2f477b73417e63e481d6f3ffc208d4efa49fb49db' 
  AND token = 'd27u2V4rWYrQZSYy0bdSFkzhTGbBCGNkM6B1U5/ltCY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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