Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faec8e3df9f1978f97cb42bfcf2b9ae809bfeecee0278f193499149d6a673b86' 
  AND token = 'T7vsL0uqZOmb3e9qBD1VNScSHVJS9PSkduGgsb0jVRQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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