Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '98f44471ef7837fb71382816dea45bb7cd639d0013665acef30303e08e5d475b' 
  AND token = 'jQ/cRWRP2CIjc9CYWRIngWy3uR7Q3HTlQO+A62Xz+7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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