Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '7d121fc603eea63d2c5527750d3269009f2157eadbb5d4379da5e0db7c0a18e7' 
  AND token = 'mZ2/9gHCNq5APMGdaK7HYQ7sAXMnnxoPIpKDCuawja0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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