Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a4c4d7636cb98ad14324c6b80baf567cba58da8186a3d67275f7d85a52dda80' 
  AND token = '0C+OH4wfMBqfA38ykc4pHOfRBdp8re+ZlyOSkeR6gRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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