Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '88dcb0dbaa7c62458d2f197221e900faa203a195f72cb9dccf39abd1227d69e1' 
  AND token = 'C/BVfB4MHsVp0qGbA7FdrLN2zb7B5BYUJ/tOsXZ1YU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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