Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5651f13f28e8fd8bc9f5b87899dd2a85d18db0b5cb1e8eaa4bd29e4ea0e4292f' 
  AND token = 'rCxHHAh/gEOkJ8ZqgnI8+J/l+zEudREh6WylxQH289I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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