SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7113c0ef59dca95a2063c090027e9b3c748ebc2543db944a8649aa3f6332e669' 
  AND token = 'iLWHpTeVOoOs/D+vvtWhqn/wMyvC5Zb6kB+u2XX6NnI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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