Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4d3e9f75cacc1512492dbfc2d4515f9a0b3b1ac4f2b664ad1e868dcad91c7cc6' 
  AND token = 'n5Mmd4QP63/bSYtKYhPbVlLClCsG+05WZxnhX6HWPxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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