Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e99861dab38079fcfbc6a7e151dc18c4626cd2cedf73db7c864a51f3fa80bc87' 
  AND token = 'FAWYvAP/URzP6w9dYuB8E+9L7RfqD6EaVIuk30wJozE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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