Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '36f50022eaa50499f087b57de56c15855d4c8e73ca62f3de5c88f28975ce2472' 
  AND token = 'D0a4r3SbjwCGejYDRr6PkUiz4ogv7NQAHO+ZpqSK3wQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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