Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8ff5d08ad0e78f49b3a4ca491a9d0f8d1d8d76280ceb773ed7fe3818af1f9c0' 
  AND token = 'fY8A8SEzmdL1/7/HDcnLOTlnu1pUj9CLMnliv0nxnks=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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