Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f670be97edd8b7db7a6f7f84acda68f3527d5be08ad3b3dc173b8db1f56b23d' 
  AND token = 'buAZCDjU9Y17KMogkxCjQdPIIUk0zm5lZBFyt6d2LVQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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