Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '93ca51f3d848599275270cf087ffb60f796ed5dd119e46570ebb77f3081ea070' 
  AND token = 'FlGHVJNmzzpRztZa2lUry1kH2pcL6DpiTcjFNd15a1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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