Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2738c11dfc4e50502786a102aa0020748b2e82d9edadedb299969eddfbf3443' 
  AND token = 'ic3kpyaYJsTgW5pDDvzBqoDK4w4w8GG+ig+pzG3xAbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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