Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f85465169e0f6b3addf6118cfe3473376f9545ec166663ac80bded9bbc7295f7' 
  AND token = 'KYdCjDDmMysf1qoNjzmcNjz0Z38oPXVw50BLDiYmuqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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