Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8346dabefb1231fafe256ec26369d3a2980596c4ac1234d63f9ef6df367a90ec' 
  AND token = 'jihKXIIpc1tZ6xRU5ZsYK3p1OLZWO88M/VBMIOaTOzM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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