Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4b758aabd2fa5420a00e4d44e4da533dbe101f7f595caf7e5881a323e05949e5' 
  AND token = 'zqGSLrAwGkI47cB/vIaRcZzkjj3ZTINEmwhor22B9tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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