Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d1ee6b09c0d9969d0f129950af8ff210bc7d9ba05e0043cf245a539aab8bcb9' 
  AND token = 'jvbuzPH4o2oUowjBzi3a+3JdVD9gVB1dubRC/nAkgqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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