Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f57a757c486e65997abf21a871ed6e6129b9c59b77196d9f78e9ab17bbfdf8ad' 
  AND token = 'NSHnvP7atNOFlaIqHVaBEe0QOFvpDiQeAa7w1jxUvyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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