Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1d120f5ec889dc53e29190f4fe01bb1bd6bf6f627bcabd5e4fa29a85ba8165b9' 
  AND token = 'dLIcW7X67JoSpAUz9MgPviM+dwb2pCQ4zN+HJz95iH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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