Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd73dcbb39c0fc22af219a7d3217efeda5f946213b6c96c87aa0a337065f106a9' 
  AND token = 'r01ZwPWHStxrAcUCtuODMwthnmNfGbPOIYC/zyot7oA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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