Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '473db087c36d08c4db3c66b3a9250020d8e5f44906da33a7d133fe9e87da3bb9' 
  AND token = 'Ca0dthOfmGi+GxbyBHaA7nd9Zf5pNT3oCSmHRsA175w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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