SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7deb7117b6e90c8d8591b4b002e8987abcaef36971b4b2791c299ea17f137243' 
  AND token = 'iw7wFG/nY4JPBBB0yIkYa7UWHdU/zhXw/CHvfxVW+UI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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