Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd5dc8f733241580d01600fe5947c6b32e513da1f0a97d00877e8fabc4d5b454' 
  AND token = '/hockSRyFBUR7oAzzrbez1GOUuoXMQ41/gYpws+5Se8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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