Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7962dd7af325dd5dab35c35d0526b532d0dcabb85674b9080a9d7d280da5731' 
  AND token = '35LF3tfMBTIl53Klo0WJ1W2gTLmaJPPMjeT+a3s1tKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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