Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8677cc35dc6642e6b2512d9c0e67ed067d4b8d1d41cd5108fa3776cf1f121266' 
  AND token = 'cUE3FqgBvmL3RtMSWv9TfWEwLXuSroCHYOX6cDvwvr8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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