Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb9fd489b11489632d8db0fab55a0cc5dfe920dda55c7a0cb8cac45d46b48ea4' 
  AND token = 'ZtcszCNO0ED4XS7QZ7IwY1tguJdLsWbhC0lUIXa+Xa4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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