SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e466d04c73c87014956d25996e043ed3026c858e2c3ed401d2181a18ddd9799' 
  AND token = 'saKQq8mquYmD/kx0Ww9in7gBVIx1DWGPZCPVzppzwpk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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