Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f5fd5be48cbc2b7c32f3acd4493d4ca43166e766774174502d448c2d08ebe25' 
  AND token = '3nE4EA/aIH870FgpolOOrCGyV2BhaJV+Axo5LN8Rw/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}