SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1ed2c145f1fc842d03e84f9285c48132cde4d7354108e2a6b2e3f63957e8bdd6' 
  AND token = 'o0yo+jKVoHwtwx239JUzKMdgadMvYnK1XjFwrxZPG50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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