Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeac21aa96abbee8a7b1cf22710444933e566a16e7e26f9030d3a991b6769dae' 
  AND token = 'z6vXIsx5PTgky0VvnvFJuJmJS7uJFO/SAQgmizHtOH0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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