SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad1bb0a30a5947d7ce0a9f8243c04c3e6802b955172a01728c6a107af3007609' 
  AND token = 'ixZy1Pp2JKudYjJfI/OqkUCvTIeyPFwp314IHDqGEkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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