Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '224e662d9e13ce35215fe2015cc7081cf0437508370c20857b77169147485716' 
  AND token = 'K82bVeTVMiZBYj97HNtwSy3To0WTTvWsELyCG8bRGkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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