Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eecaf5faf062b64498e95cd9049627d045ceb6f65af86f4e875236d38ffbf19' 
  AND token = 'KvyIg9kKc5yJj1whPb7Tow+5kEkHvs5uPv7vumNaUk8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}