Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9812212d8e623ebea29bbac4689ec548d9a5c2ca4e3325095276df44142e44b2' 
  AND token = 'QqysXG9FVdmOhVeIoiw+rCKG4gHXEss0h+Mz0ZJXidg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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