SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e34c28d96e05cc7b044bfc26f83fa5dd28f45880963f3770570fe6c3ad199d2a' 
  AND token = 'l8LhvTXbZ8K7bPDyonOhG0ZSPro3Vbaw/t1QhvHSg1Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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