Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fd122d24197499a0260e45ff79484a15680316b9183d6c89928be8c239d49ef' 
  AND token = 'CTXLLqSmfFW/ufc+cxioFKOb/f4Z5Z9MVUb593qZatw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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