Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d7f8f76d8dc352ca9ebda715dcf46de01bf9b89acdec7ea392b086d3f7eea6f' 
  AND token = 'qppi1SZFaHyhOAodXxut4GIzrODPUODfxrNHi4OflyE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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