Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6487b60082e41cf687dfb8d80dfe869e0837340e439e6f0e481ce90ed0c2f6a' 
  AND token = '8CCXtEP2xFF//WlaPYuPyeXZyqUqAdiujufA0hKVL2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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