SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1bc85892ea022f2000527e9b0736d1809c1556b4f01db448fbe20ca114944672' 
  AND token = 'Ka63bfKNxnvhC1y+6JqoGr94rbjj9xpQIrgL1Y7brzs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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