SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93d22dd36b15422904c19bdf0a428abdd78663098eb1fce255c9e7b66abc5d75' 
  AND token = 'pPcsg5PtIVwvueKF/uelIQ4gCc4WQQmuUHcJYJqXn4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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