Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0a131cbc715a5c356b6e945e77dce51df6fce4c88d270e8e60abf3304bab5233' 
  AND token = 'dqSdyjuTXlO3DVVABLE7n5brAGRHFbKXBtaGcjhKiGs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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