Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '358942f8fd8e7d8d93905e7a9acb717d4f4d6bb28cbcd3f9322b918e98a63952' 
  AND token = 'Zbh36E3ct/RBoDpN3RXPvjCCnWtdUDqPb8eFm1qLuNQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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