Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4c74e8a385a02c0e603dddb210a5c729001aff7a25e68f4e43eef980cb74a9aa' 
  AND token = 'edFKg7VxFbb9lPpYHaITXgwn38+/Q8aL98PhLxEmToc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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