Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8188fe483dcec3b06b02efcbb22896dd0fa4f622de96bdffdbd967f6e3d089d0' 
  AND token = 'UkBAR2orSpXGNi5V3xLLqd8ryZgEGgN3rrxtpYPmAVY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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