Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09cfb4964aa2a7ef3873ba9961d6226c3deaecf68a73f0d347b6378fc6a6d506' 
  AND token = 'uCBd//RAj+saLi8kZfkQENcRfJCM5botWTzdP0doYsQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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